User's Manual

Table Of Contents
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D-620003-0-20 Rev K CONFIDENTIAL
Replacing a Main Hub
Checking the Main Hub’s LEDs
The LEDs should blink through a 5-second test on power up.
If the LEDs do not blink on power up, replace the Main Hub.
If the LEDs do not illuminate at all, make sure the AC power cable is con-
nected.
For each fiber optic port that has a connected Expansion Hub, which has been pro-
grammed with a band:
The
LINK LED should be green.
The
E-HUB/RAU LED should be green indicating that all downstream units are
functioning
Refer to Section 9.3, “Troubleshooting,” on page 9-3 for more LED states.
NOTE: If there is communication between the Main Hub and the Expansion Hubs,
use the AdminManager to isolate system problems.